In the grounding sequence, which action is performed after opening the Load Break Fuse?

• A. Ground line side of fuse
• B. Ground load side of fuse
• C. Ground secondary bus
• D. Open ACBs

Answer: (A)

Grounding the line side of the fuse after opening the Load Break Fuse keeps the source-side conductor at earth potential and safely drains any residual energy. Once the fuse is opened, the line side could still carry voltage or be charged by capacitive effects or nearby energized lines. Bonding that line side to ground eliminates potential differences, prevents accidental re-energization, and reduces shock or step-potential hazards for workers in the area.

Grounding the load side isn’t the immediate priority here because the load side has been separated from the source by opening the fuse, so it is no longer connected to the energizing source. Grounding the secondary bus or opening ACBs pertains to other parts of the system or sequence and isn’t the next action in this specific grounding step.